Rapid growth kinetics of intermetallic Ni3Ti compound under electrostatic levitation state

L. Wang; L. Hu; D. L. Geng; B. Wei

doi:10.1016/j.matlet.2019.07.086

Rapid growth kinetics of intermetallic Ni₃Ti compound under electrostatic levitation state

L. Wang
, L. Hu
, D. L. Geng
, B. Wei

School of Physical Science and Technology

Northwestern Polytechnical University Xian

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

Abstract

The rapid solidification mechanism of Ni₃Ti intermetallic compound within undercooled Ni₇₅Ti₂₅ and Ni₇₄Ti₁₈Al₈ alloys was investigated by electrostatic levitation(ESL) and liquid quenching(LQ) techniques. The dendritic growth velocity of Ni₃Ti phase in these two alloys revealed power law relations versus liquid undercooling, whose maximum value was 138.9 mm s⁻¹ for binary Ni₇₅Ti₂₅ alloy at 255 K(0.15T_L) undercooling, while it was only 54.7 mm s⁻¹ at 222 K(0.13T_L) undercooling for ternary Ni₇₄Ti₁₈Al₈ alloy. The crystalline structure of Ni₃Ti phase in both alloys was characterized by fine dendrites under LQ state, whereas it displayed faceted growth mode under ESL condition. In addition, the Ni₃Ti grains of Ni₇₅Ti₂₅ alloy show a transition from incompletely to completely surrounded by the grain boundaries.

Original language	English
Pages (from-to)	290-293
Number of pages	4
Journal	Materials Letters
Volume	254
DOIs	https://doi.org/10.1016/j.matlet.2019.07.086
State	Published - 1 Nov 2019

Keywords

Dendrite growth
Electrostatic levitation
Intermetallic alloys and compounds
Microstructure

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10.1016/j.matlet.2019.07.086

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@article{33a513a56de14fee8e2bc87dad57be48,

title = "Rapid growth kinetics of intermetallic Ni3Ti compound under electrostatic levitation state",

abstract = "The rapid solidification mechanism of Ni3Ti intermetallic compound within undercooled Ni75Ti25 and Ni74Ti18Al8 alloys was investigated by electrostatic levitation(ESL) and liquid quenching(LQ) techniques. The dendritic growth velocity of Ni3Ti phase in these two alloys revealed power law relations versus liquid undercooling, whose maximum value was 138.9 mm s−1 for binary Ni75Ti25 alloy at 255 K(0.15TL) undercooling, while it was only 54.7 mm s−1 at 222 K(0.13TL) undercooling for ternary Ni74Ti18Al8 alloy. The crystalline structure of Ni3Ti phase in both alloys was characterized by fine dendrites under LQ state, whereas it displayed faceted growth mode under ESL condition. In addition, the Ni3Ti grains of Ni75Ti25 alloy show a transition from incompletely to completely surrounded by the grain boundaries.",

keywords = "Dendrite growth, Electrostatic levitation, Intermetallic alloys and compounds, Microstructure",

author = "L. Wang and L. Hu and Geng, \{D. L.\} and B. Wei",

note = "Publisher Copyright: {\textcopyright} 2019 Elsevier B.V.",

year = "2019",

month = nov,

day = "1",

doi = "10.1016/j.matlet.2019.07.086",

language = "英语",

volume = "254",

pages = "290--293",

journal = "Materials Letters",

issn = "0167-577X",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Rapid growth kinetics of intermetallic Ni3Ti compound under electrostatic levitation state

AU - Wang, L.

AU - Hu, L.

AU - Geng, D. L.

AU - Wei, B.

PY - 2019/11/1

Y1 - 2019/11/1

N2 - The rapid solidification mechanism of Ni3Ti intermetallic compound within undercooled Ni75Ti25 and Ni74Ti18Al8 alloys was investigated by electrostatic levitation(ESL) and liquid quenching(LQ) techniques. The dendritic growth velocity of Ni3Ti phase in these two alloys revealed power law relations versus liquid undercooling, whose maximum value was 138.9 mm s−1 for binary Ni75Ti25 alloy at 255 K(0.15TL) undercooling, while it was only 54.7 mm s−1 at 222 K(0.13TL) undercooling for ternary Ni74Ti18Al8 alloy. The crystalline structure of Ni3Ti phase in both alloys was characterized by fine dendrites under LQ state, whereas it displayed faceted growth mode under ESL condition. In addition, the Ni3Ti grains of Ni75Ti25 alloy show a transition from incompletely to completely surrounded by the grain boundaries.

AB - The rapid solidification mechanism of Ni3Ti intermetallic compound within undercooled Ni75Ti25 and Ni74Ti18Al8 alloys was investigated by electrostatic levitation(ESL) and liquid quenching(LQ) techniques. The dendritic growth velocity of Ni3Ti phase in these two alloys revealed power law relations versus liquid undercooling, whose maximum value was 138.9 mm s−1 for binary Ni75Ti25 alloy at 255 K(0.15TL) undercooling, while it was only 54.7 mm s−1 at 222 K(0.13TL) undercooling for ternary Ni74Ti18Al8 alloy. The crystalline structure of Ni3Ti phase in both alloys was characterized by fine dendrites under LQ state, whereas it displayed faceted growth mode under ESL condition. In addition, the Ni3Ti grains of Ni75Ti25 alloy show a transition from incompletely to completely surrounded by the grain boundaries.

KW - Dendrite growth

KW - Electrostatic levitation

KW - Intermetallic alloys and compounds

KW - Microstructure

UR - https://www.scopus.com/pages/publications/85069825723

U2 - 10.1016/j.matlet.2019.07.086

DO - 10.1016/j.matlet.2019.07.086

M3 - 文章

AN - SCOPUS:85069825723

SN - 0167-577X

VL - 254

SP - 290

EP - 293

JO - Materials Letters

JF - Materials Letters

ER -

Rapid growth kinetics of intermetallic Ni₃Ti compound under electrostatic levitation state

Abstract

Keywords

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